Semi-anechoic chamber SAC-3 Plus L

Project title

Semi-anechoic chamber SAC-3 Plus L for radiated emission measurements and electromagnetic field immunity testing of household appliances.

Project execution time

Project beginning: 12/2017, Project completion: 09/2018.


BELLIS Testing and Certification of Home Appliances and Industrial Products, JSC (Republic of Belarus).


The SAC-3 Plus L semi-anechoic chamber (test facility) is designed for radiated emission measurements and immunity testing of household appliances to various electromagnetic fields in the frequency range from 9 kHz to 18 GHz at a measuring distance of 3 meters.

  • Modular prefabricated chamber construction
  • Sliding door
  • Dome-shaped roof
  • Long-life non-combustible absorbers Francosorb
  • Without organic materials

The innovative dome-shaped roof of the chamber with an optimized layout of the absorber results in minimized reflections and provides high measurement accuracy over the entire frequency range. Moreover, this allows reducing the area required to accommodate the camera, simplifying and reducing the cost of installation, reducing the total cost of the project.

  • Outside housing with a frame made of strong steel beams and modular shielded panels made of galvanized sheet steel.
  • Sliding door for access
  • Honeycombs for ventilation
  • Penetration panels
  • Non-combustible hybrid absorbers Francosorb
  • LED lighting
  • Grounded floor
  • Raised floor
  • Turntable
  • Antenna mast
  • Controller for antenna mast and turntable
  • Video and audio system
  • Power Filters
  • Measuring equipment.
External dimensions (length x width x height): 9,68 m x 6,53 m x 6 m
Frequency range: From 9 kHz/30 MHz to 18 GHz
Measuring distance: 3,0 m
Floor/ceiling: Full lining of ferrite absorbers type F006 and partial lining of additional hybrid absorbers of type H600 and H1000
Floor: Movable hybrid absorbers of type P600 with an area of 9 m2 for electromagnetic susceptibility testing;

Movable hybrid absorbers of type P300 with an area of 20 m2 for radiated emission measurements.

Emission measurements: In full compliance with the EN 55022 and CISPR 25 standards, class B

In full compliance with the CISPR 16-1-4 standard

Electromagnetic susceptibility testing: In full compliance with the IEC / EN 61000-4-3 standard
The maximum deviation from the NSA in accordance with the CISPR 16-1-4 standard: ± 4 dB
The maximum value of VSWR in accordance with the CISPR 16-1-4 standard: 6 dB
Test volume: Diameter 2,0 m / height 2,0 m
Dimensions of uniform field zone: 1,5 m x 1,5 m
Maximum deviation: 0 dB / +6 dB for 12 of the 16 measuring points

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